Heavy metal ion adsorbents formed by the grafting of a thiol functionality to mesoporous silica molecular sieves: factors affecting Hg(II) uptake

Article Abstract:

Thiol moieties which were grafted to the pore channel walls of mesoporous silica molecular sieves produced very effective heavy metal ion adsorbents which poses opportunities for operators of waste treatment and cleanup campaigns. Heavy metals such as lead and mercury are known to pollute the environment significantly to the detriment of natural ecosystems and human communities. Framework mesostructures that have many surface hydroxyl groups and huge pore channel parameters help develop framework channels which maintain appreciable open-framework features and various functional locations.

Comment:

Thiol moieties grafted to the pore channel walls of mesoporous silica molecular sieves produce heavy metal ion adsorbents

United States, Science & research, Toxic Substances Control, Poisons, Pollution control, Article

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Preparation, characterization, and applications as heavy metals sorbents of covalently grafted thiol functionalities on the interlamellar surface of montmorillonite

Article Abstract:

A new heavy metal called Thiomont was developed after grafting (3-mcercaptopropyl)trimethoxylane wth the interlamellar surface of montmorillonite. Tests showed its high adsorbent power for lead and mercury. It has undergone several tests including x-ray diffraction, infrared spectroscopy, flourescence and thermogravimetric analysis to characterize its properties. Tests also showed it has capability for regeneration and binding affinity with heavy metals.

Research, Romania, Montmorillonite, Thiols

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Heavy metal adsorbents formed by the grafting of a thiol functionality to mesoporous silica molecular sieves: factors affecting Hg(II) uptake

Article Abstract:

A grafting process has been found to be effective in producing sieves that bind quantitatively more heavy metal ions than standard techniques. The sieves were made using covalent grafting of 3-mercaptopropylsilyl groups MCM-41 and HMS to the framework pore walls. The functionalized HMS derivative has found to bind more mercury (II) ions than the initially anionic MCM-41 derivative.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Mercury, Industrial Water Pollution, Evaluation, Waste management, Mercury (Metal), Mercury compounds, Hydrotreating catalysts

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